#include <stdio.h>
int main()
{
	int y = 0;
	int m = 0; 
	scanf("%d%d",&y,&m) ;
	switch(m)
	{
		case 1:
		case 3:
		case 5:
		case 7:
		case 8:
		case 10:
		case 12:
			printf("31"); 
			break; 
		case 2:
			if(y%400==0 || (y%4==0 && y%100!=0)) 
			{
				printf("29"); 
			}
			else
			{
				printf("28") ; 
			} 
			break; 
		case 4:
		case 6:
		case 9:
		case 11:
			printf("30") ; 
	}
} 
